i have a 2003 es 300 the other day the check engine light came on and it was running fine then steam was coming out from under the hood from the hose into the overflow bottle i pulled over called triple a it has been in the shop for 4 days they replaced the thermostat still over heating its funny that the temp gauge doesn't go to hot at all. when its cold it runs great then heats up and the car wont idle, the shop pressure tested the system its ok is there a sensor on the ps pump to check
any help would be great
thank you
